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Fehling’s solution, or Fehling’s reagent, is a chemical reagent that is used to distinguish between an aldehyde and a ketone other than α-hydroxy ketone. Practically, it is used for the determination of reducing and non-reducing sugars that are present in carbohydrates.
Fehling’s test developed by German chemist H.C. Von Fehling is a test used to differentiate between ketone functional groups and water-soluble carbohydrates. Learn more about the preparation, procedure, reaction and uses here.
Fehling’s solution, which is a blue solution, contains Cu2+ ions (Cu +2) which are reduced to a brick-red precipitate of Cu2O (Cu +1) as it oxidises the aldehyde to a carboxylic acid. This reaction is used as a simple test to distinguish aldehydes from ketones.
18 Απρ 2022 · Fehling’s test is a chemical test used to differentiate between reducing and non-reducing sugars. This test can also be used to distinguish ketone functional group carbohydrates and water-soluble carbohydrates. Objectives of Fehling’s Test. To detect the presence of carbohydrates in a solution.
Fehling’s solution is an alkaline solution containing copper (II) ions which act as the oxidising agent. When warmed with an aldehyde, the aldehyde is oxidised to a carboxylic acid and the Cu 2+ ions are reduced to Cu + ions.
22 Απρ 2024 · What is the Fehling’s test? Hermann Von Fehling discovered in 1849 in a solution (also called reagent Fehling or Fehling’s solution ) that could be used for the determination of reducing sugars.
Test for an aldehyde: Fehling’s solution. In a clean test tube mix together equal volumes of Fehling's solution A (blue aqueous solution of copper (II) sulfate pentahydrate crystals) and Fehling's solution B (clear solution of aqueous potassium sodium tartrate and a strong alkali).
